Grate-bar.



No. 844,941, PATENTED PEB. 19, 1907. A. L. HOWARD.

GRATE BAR.

APPLIOATION FILED` JUNI: 14, 1906.

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GRATEBBAP.

Specification of Letters Patent.

Patented Feb. 19, 1907.

Application filed June 14,1906. Serial No, 321,644.

- of this character adapted for the purpose of lward undercut edges 6.

burning culm, sawdust, and the like.

The object of the invention is to provide a device of this class simple,strong, and durable in construction and inexpensive to manufacture andwhich presents removable top sections which may be easily replaced fromtime to time as circumstances require.

A further object of the invention is to provide a grate-barparticularlyadapted to the burning of fuel consisting of smallparticles, such as sawdust.

The invention consists in the construction and combination of parts tobe more fully described hereinafter and particularly pointed out in theclaims.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar characters of reference indicatecorresponding parts in all the figures.

Figure l is a plan view of a grate-bar of my invention. Fig. 2 is alongitudinal vertical section on the line 2 2 of Fig. 1. Fig. 3 is avertical cross-section on the line 3 3 of Fig. l. Fig. 4 is alongitudinal section of a portion of the device on the line 4 4 of 1,and Fig. 5 is a longitudinal section of a part of the device on the lineof 5 5 Fig. l.

Referring more particularly to the drawings, the improved grate-bar is.provided with longitudinal side pieces or bars l, joined by end pieces2 and transverse uniting-pieces 3 and 4. The end pieces and transve; sepieces are preferably formed integral with the longitudinal bars, andthe device may be constructed of cast-iron or other similar suitablematerial. The end pieces 2 are provided on their under side withprojections 5, and the grate-bar is hung in the furnace by means of itsextremities in the usual manner. The end pieces 2 extend above the upperedges of the longitudinal bars 1, presenting in- The transverse piece 4extends upwardly above the edges of the longitudinal bars, vwhich itjoins, while upper edges flush with the edges of the longitudinal bars.

Removable sections 7 are employed, which are adapted to be placed uponthe longitudinal bars l. rIhe ends of the sections 7 that are adjacentto the ends of the bar have beveled edges S, which are adapted. toengage with the undercut edges 6 of the end pieces, asappears mostclearly in Fig. 2. he sections 7 are provided with a plurality ofperforations 9, which are preferably comparatively small in size andlarge in number to permit the burning of small-sized fuel, such assawdust. The perforations preferably taper upward, as shown in Figs. 2and 3. The sections 7 extend laterally beyond the longitudinal side barsI, and the sides of these sections are pro,- vided with semieircularrecesses, which, with similar recesses in sections of adjacentgratebars, form pei'forations IO.

The ends of the sections 7 adjacent to the transverse piece 4 areprovided with recesses which are adapted to receive the upward extensionof the transverse piece 4. The edges of the sections adjacent to therecesses adapted to receive the transverse piece 4 are beveled orundercut to engage with the corresponding undercut or beveled edgesadjacent to the recess of an opposite section 7. It will be understoodthat by means lof the beveled and undercut edges, as well as theengagement of the transverse piece 4with the edge recesses of thesections 7, the latter are securely retained from accidentaldisplacement in firing and cleaning the furnace. An additional safeguardagainst accidental displacement is afforded by forming integral lugs llon the under side of the sections l, these lugs extending transverselyacross the section and being adapted to fit between the longitudinalbars I.

It is preferred to provide each grate-bar with two perforated sections7. These are removable and may be used interchangeably at either end ofthe device. 'Io remove such sections, it is merely necessary to raisethem near the middle point, where they engage with the transverse piece4, and draw them out from engagement with the undercut edges of the endpieces. It will be understood that. they may be used interchangeably ateither end of the bar, as the edges of the sections 7 adjacent to therecesses adapted to receive the transverse piece 4 are alternatelybeveled and undercut, while the edges of the the remaining transversepieces 3 have their opposite section are alternately undercut and IOObeveled. By means ol removable top sections the grate-bars may beconveniently renewed at small cost, for the destructive ei'lect of theiire does not directlyreach the bar itself, but practically affects themovable top sections alone, and these are easily removed and replacedwitliout difficulty and at low cost.

Having thus described my invention, I claim as new and desire to secureby Letters Patent` l. A device of the class described7 comprisinglongitudinal bars having end pieces and transverse pieces uniting saidbars, one' of said transverse pieces having an upward projection, saidend pieces being undercut, and perforated sections adapted to rest uponsaid bars, said sections having ends adapted to engage with saidundercut end pieces and recesses adapted to receive said projection.

2. A device of the class described, comprising longitudinal bars, havingend pieces and transverse pieces uniting said bars, said end piecesextending above said bars and presenting undercut edges, one of saidtransverse pieces projecting above said bars, and perforated sectionseach having a beveled edge adapted to engage with one of said undercutend pieces, said sections each having a recess adapted to receive saidprojecting transverse piece.

3. A device of the class described coini prising longitudinal barshaving transverse pieces uniting said bars, one oi said transversepieces projecting above said bars, and

removable perforated sections upon said bars, means for holding in placethe ends of said sections adjacent to the ends of the device, saidsections having recesses adapted to i receive said projecting transversepiece, an

edge of one ci said sections adjacent to the recess being beveled toengage with an undercut edge of an opposite section, and an edge of saidsection adjacent to said recess undercut to engage with the beveled edgeof the opposite section.

4. A device of the class described, comprising'longitudinal bars, havingend pieces projecting above said bars, and transverse pieces unitingsaid bars, one of said transverse pieces projecting above said bars,said end pieces presenting inward undercut'edges,

and perforated sections having beveled edgesy adapted to engage withsaid undercut edges ol said end pieces, and recesses adapted to receivesaid projecting transverse piece, the edges otl said sections adjacentto said recesses being adapted to engage the edges of y an adjacentsection, said sections being provided on the under side withtransverse-lugs adapted to 'lit between said bars.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

ALVAH LESTER HOl/VARD.

Witnesses D. O. VINCENT, S. A. FAIRGHILD.

